Porous-concrete floor



Feb., 2g, 1928. l x Mami@ I K. P. BILLNER i vPoRoUs CONCRETE moon Filed oct. 21, 1924 Patented Feb. 28, 1928.

KARL rAULr BIIQLNER, OF STOCKHOLM, sw ronA'rIoN OFAMERIGA, or NEW YORK,

N. Y., A. CORPORATION F DELAWARE'.

` ronces-CONCRETE FLOOR.

Application led Octobe'r21, 1924.-, Serial No. 744,932, and in Sweden October 22, 1923.-

This invention relates to a floor constructionmade of cellular concrete and steel remforcement in combinatwn withordmary cement concrete. Thecellular concrete may y 6 be made' by using either `a chemical o'r a mechanicalprocess in known manner.

A Hoor according to `this invention is made as follows:

Precast (made before-hand) reinforced 10 beams of cellular concrete of such length that they will span the entirewidth oa room y or a panel are to be mounted into lace so that they will lie closely side by si e. `The beams are to be made wider at the bottom than at'the top so that when placed side by side with their bottom parts touching one another there will be open vertical slots between the beamsofrom the top -surface part' of the way to the bottom. These slots will be iilled with solid concrete and ift-he span of the beams is great, a layer of solid concrete will be poured on top in connection with the filling o-the mentioned vertical slots.

The compact concrete may be .reinforced with steel bars vat the bottom of the slots and transversely ontop if wanted. This reinforcement is not lneeded-for ordinary spans and loads. The slots should taper slightly so that they are Widestat the, bottom. crete, serve to tie the beams together so thatl ita load is concentrated on one beam, then the adjacent beams will also help' in carry-` ing the mentioned load. The strings of solid concrete in the slots and the layer of solid concrete on top of the beams will serve to give the fiooring suiiicienty stiffness. It will be understood that for vordinary spans the sary.

On. the accompanying drawing Fig. 1`-

are needed. `The beams ot' cellular 'concrete' are about as light as wooden sills oi same dimensions and the Iinished floor will .be

They will, when filled with solid conlayer of solid concrete on topis not neces-` lighter than an ordinary concrete Hoor. After cutting the-'reinforcement the beams may be sawed OE with an ordinary carpenters saw if they do not fit. A iioor of this kind has proved to be very sound-reslstmg and possesses exce tionally good qualities in regard to insulatlon against heat and cold.'

Having thus described the invention, what is claimed is:

1. A floor comprisingvprecast beamsof cellular concrete placed with their adjacent kedges close to each other, the beams eom' prismgbody portions and flanges extendin from te sides at the bottom thereof, poure compart `concrete between the beams andA forming stiffening ribs, the poured concrete particles entering theporesfof lthe beams,

thereby 'forming an integral solid concrete EDEN, ASSIGNOR TO THE AEROCRETE COR- structure and binding the beams together.

A iloori comprising precast beams of solid'cellula'r concrete placed with their adj jacent edgesclose toy each other, the beams comprising body portions and flanges eX- tending from the sides at the bottom thereoi', poured4 compact concrete between the beams and forming stiiiening ribs, the poured concrete particles entering the pores of the beams, thereby forming an integral solid concrete structure and binding thev beams together.

3. A floor comprising precast beams of cellular concrete placed with their adjacent edges close to each other, the beams comprising body portions and ianges extending from the sidesat the b'ottomthereof, the bodies of the beams being of greater width at their tops than ata lower portion,

poured compact concrete betweenthe beams and 'forming stiffening ribs, the poured concrete particles entering the `pores of the beams, thereby ormin an. integral/solid concrete structure and binding the beams toY gether. y

4. A -ioor comprisin precast beams of solid cellular concrete, p aced.1 withA their adjacent' edges tending from the sides at the bottom thereof, thebodies ofthe beams belng of'greater ,width at their tops than at a lower portion,

yloo close to each other, the beams comrising body vportions and flanges expoured'compact concrete 'between-the 'beams and ormmg stiiiening ribs, the poured cOn-.

crete Iparticles enteringk thev pores of the beams, thereby forming an integral solid concrete structure and binding thel beams together.

5. A oor comprising precast beams of 5 solid cellular concrete, placed with their adjacent edges close to each other, the beams comprising body portions` and lflanges extending from the sides at the bottom thereof, the bodiesof the beams being of greater 10` Width at their tops than at a lower portion,

the beams having reinforcing rods at their lower portions, poured compact concrete between the beams and forming stie'ning ribs, the poured concrete particles entering the pores of thefbeams, thereby forming an in* tegral solid concrete structure andbinding the beams together. i

In testimony whereof I have affixed my signature.

KARL PAULI BILLNER. 

